Power-press.



N.891435.. ,PAT Tn-JUm-:z 10, o V. K. v. PALMER. BNB 3 9, 8

' POWER PRESS.

APPLICATION FILED 113.25, 190

7 3 SHEETS-SHEET 1.

``"In Mii-@l y df "Wi-mum l TTORIIEYS No. 891,435. PATBNTBD JUNE` 2s, 190s.,

' V. K. V. PALMER.

POWER PRESS. APPLICATION FILED FBB.25.1907

3 SHEETS-SHEET 2.

INVEN TUR TTHNEYS No. 891,435. v PATENTED JNEIZSQIQOB. V. K. V. PALMER.

PUWBR PRESS.

APPLIoATIoN Hum 11:11.25, 1901.

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IN VE N TOI? VcforKPalmn PATENT oEEroE.

UNITED sTATEs POWER-PRESS.

Nasen/135.

Specicatonof Letters Patent. Application led February 25, 1907.

Patented .Tune 23, 1908. serial No. 359,169.

Tocll whomfit may concern:

-Be it known that I, VIKTOR K. V. PALMER, a 'subject of the King of Sweden, and residing at Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Power- Presses, of lwhich the following is a specification, such as will enable those skilled in the art to which it a'ppertains to make and use the same.

This invention relates to power presses adapted for cutting, forming, perforating,

unching, pressing and otherwise treating all kinds of sheet metal, pasteboardpaper, celluloid, leather and other sheet materials; and the object thereof is to improve a power press ofthis class in such manner as to secure greater safety in the operation thereof and reduce the danger to operators of such press. In power presses of this class as usually constructed the plunger and crank are connected in such manner that the plunger has a vertical movement equal to 'the greatest throw of the crank and as a result the punch which is connected with the plunger is raised so high above the stripper that the operator frequently passeshis hand beneath the plunger and is seriously injured, if not crippled for life; and one of the objects of my invention is to provide means whereby `the vertical movement of the plunger will be limited to such an extent that the danger of inserting the hands or fingers'beneath the same or between'the punch and the stripper will be almost if not entirely overcome, t e movement of the plunger being just sufficient to strip the material or workpiece 0H of the punch; a further object being to provide an improvement in presses of the class specified whereby the vertical movement of the plunger, or the extent thereof may be regulated at will; and with these and other objects in view the invention consists in a press of the class specified constructed as hereinafter describe and claimed.

r`l`he invention i's fully disclosed in the following specification, of which the accompanying drawings form apart, in which the separate parts of my improvement are designatedby suitable reference characters in each of the views, and in which:-

l'Figure 1 is a perspective view of an ordinaryjpower press provided with my im rovement ;'Fig. 2 a sectional side view of a p unger which constitutes the subject matter of this invention 5 Fig. 3 a view sim'lar to Fig. 2 but l showing the parts in a different position and showing a die, a stripper connected therewith and a workpiece in position; Fig. 4 a front view of the back plate of the plunger with the adjustable parts detached; Fig. 5 a back view of the adjusting part of the l plunger; Fig. 6 a bottom view of the part 7 alower end view of the shownin Fig. '5 Fig. crank rod by which the plunger is operated; Fig. S a view similar to Fig, 2 but showing a modification; Fig. 9 a view sim'lar to Fig. 8 but lshowing the parts in a dierent position; Fig. 10 a view similar to Fig. 4 of the `back plate of the plunger shown in Figs. 8 and 9; Fig. 11 a front view of the adjusting part of the plunger shown in Figs. 8v and 9; and, Fig. 12 a bottom plan view thereof.

ln the drawing forming part of this speciiication, l have shown at a, in Fig. 1, an ordinary power press of the class specified, and to which my improvement is applied, and this power press is provided inthe top portion thereof with a transverse crank shaft b provided centrally with a crank b2 and at one end with a drive wheel b3. The framework of the press is also provided with a bed plate 0.2 on which, in practice, the die c is placed and said die is provided with the usual stripper c2 between which and the die c, the workiece c3 shown in Fig. 3 is placed.

The framework of the press is provided below the crank shaft with vertically arranged keepers a? in which the plunger d is movable, ,and said plunger d is connected with the crank b2 of the crank shaft b by means of a rod e shown in Figs. 2, 3, 7, 8 and 9, said rod being provided with suitable means e2 as shown in Fig. 1 by which it is connected with the crank b2 of the crank shaft in the usual manner.

In constructing the plunger d as shown in Figs. 2 to 7 inclusive, l provide a back plate d2 movablein the keepers a3 andprovided at its lower end with a cross head d3 in the bottom of which thepunch d4 is secured in the usual manner. The back plate d2 of the plunger is provided with parallel vertically and said side portions of the block f are provided with vertically arranged slots f5 through which are passed bolts f 6 which are also passed through apertures d6 in the back plate d2 and by means of which the block f may be secured to and vertically adjusted on the back plate to any desired point.

Secured to the top surfaceof the head d3 and to the plate d2 by means of bolts or screws f7, and ranging` forwardly and backwardly of said head, and centrally thereof, is a block g which is adapted to enter the vertically arranged opening f2 in the central part of the vertically adjustable block f, and on whichl said blockf is free tomove in the adjustment thereof, and said block g is provided in the top thereof with a semi-circular recess g2. The vertically arran ed opening f2 in the vertically adjustable b ock f is provided at the top of the body portion of said block and at the front and back sides thereof with transverse members f8 and j, and the opposite side walls of the opening f 2 are provided with` vertically arranged grooves.

The rod e, by means of which the plunger is connected with the crank shaft, is provided at its lower end with an enlarged porat the bottom of the are laterally directed adapted to move in vertically arranged grooves e4, in the opposite side walls of the vertical opening]r2 in the adjustable block f and the upper ends of the grooves e2 which open downwardly through the bottom of the block f terminate just below the transverse members f8 and fg at the front and back of the top portion of said block and between which the lower end or head portion e2 of the rod e is freely movable. With this construction, it will be seen that the block f may be secured to the back plate (Z2 of the plunger at different points, or said block may be adjusted on said back plate by means of the bolts f6 cured to said back plate at an desired point of adjustment. In Fig. 2, the block f is secured to the back plate in its lowest position, or in other words in such position that it rests on the head Z3 of the back plate, and in this position of the parts the rod e will give the plunger its greatest possible vertical movement,l but if said block f be adjusted into the position shown in Fig. 8, the lugs or projections e3 at the lower end of the head of the rod e will move vertically in the grooves e4 in the opposite sides of the block f during the greatest throw or movement of the crank shaft, and the vertical movement of the plunger will be very limited, said movement being only su cient to raise the punch d4 far enough to clear it of the work, piece c3. When the blockf is secured to the back plate d2 at any point above the head d3 of said back plate, the rod e moves through a portion of the throw of the crank without moving the tion or head member c2 opposite sides of which lugs or projections e3 lplunger of which Asaid block and may be tightly seplunger at all, and in this operation the lugs or projections e3 at the lower end of the rod e move freely in the grooves e4 in the opposite side portions of the block f, and it will be understood that the block f may be so adjusted on the back plate d2, as to regulate to any desired extent the vertical movement of the f forms a part and with which the punch d4 is connected, and it will also be understood that the downward force of the plunger, or the force applied in the downward movement of is occasioned by the lower end or head portion of the rod e striking on the top of the block g, and when said block f is in its lowest position there is no vertical movement of the rod e independent of the plunger. I also prefer to connect with the bottom of the block g an apron g3 which extends around the opposite sides and the front of said block, and which is designed to keep dust and dirt from collecting on, or around, the block g and in the groove g2 in the top thereof, and in the interior parts of the block f, and this apron g3 may be secured to the block f or to the head d3 of the back plate d2 in any desired manner and so as to always close the space between the head d3 and the block f, in any desired adj ustment of said block.

In the modiiication shown in Figs. 8 to 12 inclusive, I employ a block 7L which takes the place of the block f, and which is provided with an apron h2 similar to the apron g3. The block 72, comprises side members h3 separated by a vertical space h which is preferably narrower at the bottom than at the top as shown in Fig. l l, and in the bottom of said block is a semi-spherical cavity t and a corresponding semi-spherical cavity 7L is formed in the top of the cross head d3 of the back plate d2, and the vertical space h4 between the side members h3 of the block t communicates with the cavity h5 at the back of said cavity. In this form of construction,'a block i is secured to the back plate d2 centrally thereof, directly over the cross head d3 and the front face of which is concave as shown at i2. The side portions h3 of the block h are also provided .with vertically arranged slots 7N andl bolts y are'passed therethrough and the back plate d2, of the back plate is provided with forwardly directed lugs 7'2, and screws j are passed downwardly through said lugs and adapted to bear on the tops of the side portions of the block h, and by means of this construction the block 7imay be vertically adjusted on the back plate d2 in a manner similar to that of the adjustment of the block f on said back plate in the construction shown in Figs. 2 to 7. In this form of construction, the rodA e is provided at its lower end with a through and the front top portion its lowest position as shown in Fig.

cavities h5 and h6 in the bottom of said block ed position, or above the position shown in Fig. 8, and the bottom of said block is separated from the cross head d3, andit will be understood that the operation of this form of construction will be exactly the same as that of the construction shown in Figs. 2 to 7 inclusive. The position of the block 7i on the back plate d2 of the lunger determining the extent of the vertica movement of the plunger in the operation of the press, and in both forms of construction, it will be observed that when the block h is adjusted to any position above the cross head d3 of the back plate d2 the plunger will remain stationary uring a portion of the vertical movement if the rod e, and in both forms of construction the power necessary to drive the punch d4 through the workiece c3 is applied by the lower end of the ro e, or the head of said rod at the lower end thereof, exerted on the cross head d3. By means of my improvement the extent of the vertical movement of the plunger above the stripper c2 may be re ulated in such manner that the unch d4 wil be raised just high enough to c ear the work-piece c3 and to enable said punch to do the work-required by it on the work-piece, and in this way the danger of theworkman being injured by the insertion of his hand or fingers between the strip er c2 and the punch, or even between the ie c and the unch may be almost, if not entirely, obviatedl Having fully described my invention, what I claim as new and desire to secure by Letters Patent, is

1. A power press provided with a crank shaft and a vertically movable plunger connected with said shaft, said plunger comprising a vertically movable back member provided atthe bottom thereof with a cross head with which a punch is connected, a block adjustably connected with the back member, and a rod connected with the crank of the crank shaft and with said vertically adjustable block, said rod being adapted to move independently of said block.

2. A powery press provided with a crank shaft and a verticall movable plunger connected with said shaft, said plunger comprising a vertically movable back member provided at the bottom thereof with a cross head with which a punch is connected, a block adjustably connected with the back member, a rod connected with the crank of the crank shaft and with said vertically adjustable block, said rod being adapted to move independently of said block, and means whereby said rod at the bottom of its movement will bear on said cross head.

3. A power (press provided with the usual crank shaft an a vertically movable lunger, said (plunger comprising a back mem er provide at its lower end with a cross head and a vertically adjustable member mounted over said cross head, and a rod connected with the crank shaft and with said vertically adjustable member and adapted during apart of the revolution of the crank shaft to move indeendently of said vertically adjustable memer and at the lower limit of its movement to force said plunger downwardly.

4. A single acting power press provided with a crank shaft, a crank rod connected therewith, and a vertically movable plunger the connection of the crank rod w1th the plunger being a loose and movable connection movement of the lunger is less than the throw of the crank s aft.

5. A power press of the class described provided With a crank shaft, a crank rod connected therewith, a plunger suspended from the crank rod, and means for adjusting the extent of the vertical movement of the plunger and for holding the plunger stationary during a part of the rotation of the crank shaft.

In testimony that I claim the foregoing as my invention I have signed my name in presence of the subscribing Witnesses this 21st day of February 1907.

VIKTOR K. V. PALMER.

Witnesses:

C. E. MULREANY, A. WORDEN GIBBs.

whereby the extent of the verticalV 

